Designed by builder-architect Thomas Carstairs around 1799, the buildings of Jewelers Row were erected by one of the young nation’s early developers, William Sansom.
Many authorities cite Carstairs Row on Sansom Row (built from 1799 through 1820) as being one of the first major speculative row house developments in the city.
William Sansom had these buildings erected on the southern part of the site occupied by "Morris' Folly"—the unfinished mansion designed by Pierre Charles L'Enfant for Robert Morris in 1794.
The speculative block-long row house has taken an important place in Philadelphia's developmental history. The grid-pattern laid down by Penn and continued throughout the centuries by city surveyors, has contributed to this form of residential architecture.
Sansom erected the buildings on what was then the outskirts of the city and paved Sansom Street at his own expense to attract tenants. He hired Benjamin H. Latrobe to design another row on 700 block Walnut Street.
Whereas Elfreths Alley has the charm of houses with varying widths and height and different street lines, doorways and brickwork; Sansom Row was a flat repetitive expanse—ideal for conversion into a commercial district.
Late 1900 and early 20th century alterations and demolition changed most of the Row:
Jewelers Row today is the oldest and second largest, only to New York, jewelry district of its kind in the country.
Jewelers Row consists of retailers, wholesalers, craftsmen and appraisers. Some of the companies in Jewelers Row have been owned by the same families for five generations.